Note: While the last "balance" is the accurate number of bitcoins available to this address, it is likely not the balance available to this person. Every time a transaction is sent, some bitcoins are usually sent back to yourself at a new address (not included in the Bitcoin UI), which makes the balance of a single address misleading. See the wiki for more info on transactions.

27bde11ef0... Block 155665 (2011-12-02 03:58:17) 31.49 Received: Address 31.49
aeb96693d8... Block 155668 (2011-12-02 04:46:11) 31.49 Sent: Address 0